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kolbaska11 [484]
3 years ago
15

PLEASE. HELP. DUE AT 8:57

Chemistry
2 answers:
Charra [1.4K]3 years ago
8 0

Answer:

The answer to the number (33)is A.

The answer to the number (34) is B.

Explanation:

It's "A" because Xenon has 54 protons and 78 neutrons.

It's"B" because the number of protons in an atom is the same as the number of electrons in an atom. They have the same number unless there is a charge on it that either adds up or subtracts it.

Viefleur [7K]3 years ago
7 0

Answer:

dhEconomic, Social, or Cultural, was the most effective in inspiring people

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Is soil a pure or impure substance?​
irinina [24]
Impure substance, because pure would be dirt from the earth
5 0
3 years ago
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The atom as a whole<br> doesn’t carry any electric charge. It’s called a ____________ _________.
olchik [2.2K]

Answer:

Neutron has no charge while electron has a negative charge and proton has a positive charge

5 0
3 years ago
1. A cupcake show makes and delivers specialized cupcakes. It will cost someone $30 for
lorasvet [3.4K]

Answer:

2.5

Explanation:

The given costs for the purchase and delivery of the cupcakes are;

The cost of 10 cupcakes and the delivery fee = $30

The cost of 25 cupcakes and the delivery fee = $67.50

Let 'c' represent the fixed cost of delivery of the cup cakes, and let 'x' represent the cost of each cup cake, we have;

30 = 10·x + c...(1)

67.50 = 25·x + c...(2)

Subtracting equation (1) from equation (2) gives;

67.50 - 30 = 37.50 = 25·x - 10·x + c - c = 15·x

∴ x = 37.50/15 = 2.5

The cost of each cupcake, x = 2.5

(∴ The delivery fee = 30 - 10 × 2.5 = 5)

The cost of each cupcake is 2.5.

8 0
3 years ago
What products will form when potassium is added to cold, liquid water?
rewona [7]

Answer:

C

Explanation:

Potassium metal reacts very rapidly with water, which forms Potassium hydroxide (KOH) and hydrogen gas (H2).

4 0
3 years ago
Read 2 more answers
What does ph measure? 6. msg behaves as a buffer. what is a buffer? 7. if we are interested in understanding how msg behaves as
Ket [755]

1. Answer;

- pH of a solution is the measures of molar concentration of hydrogen ions in a solution.

Explanation;

-pH is a measure of how acidic/basic  a substance is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in a substance.

-The pH value states the relative quantity of hydrogen ions (H+) contained in a solution. The greater the concentration of H+ the more acidic the solution and the lower the pH.

2. Answer;

Buffer is a substance that minimizes change in concentrations of H+ and OH- in a solution.

Explanation;

-A buffer solution is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa.

-A buffer can resist pH change upon the addition of an acidic or basic components. It is able to neutralize small amounts of added acid or base, thus maintaining the pH of the solution relatively stable.

3. Answer;

By combining the two substances, we can analyze how the buffers react and stabilize the pH in the solution

Explanation;

- We found out that MSG was a buffer, and since it was a buffer more hydrogen ions is added to the solution. When we added it to the solution, it became a solid, which was what precipitated.

-There were a lot of Hydrogen protons floating around and with the MSG precipitate, we have all of these floating hydrogen and hydroxide ions. These hydrogens and hydroxide ions attach to the MSG, and the extra hydrogens would help to form the precipitate.


6 0
4 years ago
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